ACHROMATIC WAVEPLATES - CEMENTED - Tower Optical - #1

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10 561-740-2525 • Fax 561-740-2518 sales@TowerOptical.com • www.TowerOptical.com Cage Code: 1N2U3 SDVO-SB ITAR Compliant Achromatic Waveplates – Cemented • Low retardation variations • Four broad spectral ranges • Cemented construction • Clear aperture of 23 mm • Unmounted diameter of 25.4 mm • Mounted in a 30 mm ring • Retardations of ½ and ¼ wave Ordering Information Unmounted version A-25.4-B-R-N X.........................$770.00 Mounted version A-25.4-B-R-C-X.........................$795.00 R = Retardation, .250 or .500 X = Wavelength range, 1, 2, 3 or 4 Tower Optical offers this second series of Achromatic Waveplates (AWP’s) which are built using 25.4 mm substrates of crystal quartz and magnesium fluoride. These substrates are cemented together. This technique helps to control costs by reducing the number of surfaces requiring AR coating while increasing the physical size thus accommodating larger beam diameters. As with the original series of AWP’s these AWP’s are available in the following ranges: VIS 465 to 610 nm VIS/NIR 610 to 850 nm NIR 700 to 1000 nm IR 1200 to 1650 nm Each is broadband AR coated for its respective range. The retardation performance is shown graphically on the page “Achromatic Waveplates - Retardation Curves”. Waveplate Specifications Substrate material: crystal quartz & MgF2 Retardance: ë/4 and ë/2 Retardation tolerance: ë/100 overwavelength range Clear aperture: 23 mm Temp coefficient of retardation: < ë/500 per °C Wavelength ranges: 1 = 465-610 nm, 4 = 610- 850 nm, 2 = 700-1000 nm, 3 = 1200-1650 nm Transmitted wavefront distortion: ë/4@633 nm Surface quality: 20-10 Scratch-Dig Beam deviation: <1 arc minute Parallelism: <1 arc minute AOI range for < 1% change in retardance: +/-3° Optical axis: Marked on the mounting ring Temperature storage range: -40°C to +75°C Damage threshold: 2J/cm2 (8 ns pulse @ 1064 nm); 500 kW/cm2, CW Diameter mounted: 30 mm Ring thickness: 6 mm Coating: Ravg<1% at 465-610 nm per surface Ravg<0.7% at 610-850 nm per surface Ravg<0.6% at 700-1000 nm per surface Ravg<0.5% at 1200-1650 nm per surface See Retardation Curves on Page 12 See Page 13 for Waveplate Ordering Information